Trying to make a vision IF and Detector - fun!

[peter scott]

But does Adrian have the scan and focus coils for the MW6-2?

Peter

[Murphyv310]

I've a couple of spare sets here he is more than welcome to one of them.

[AdrianPH]

I have no scan and focus coils for any CRT's. I was not planning on using this tube, but if it is no use to anyone I am happy to put it into a box for the future one day I may use it.

Looking through the CRT's I have the on magnetic one I have a couple of is the 5Fp7 and with a long yellow persistence I doubt it will be put to TV use.

Adrian

[AdrianPH]

OK bit of an update to my tinkering with the home made TV.

People may think I have some form of death wish, but honestly I do not, I just work in a hap-hazard way!
   
So I have the transformer PSU driving the make shift TV as it is, the small DG7-5 CRT is pulled from it's socket and wires soldered to the socket going to another socket on a 5 inch CRT.
The EHT generator is powered by a 12 Volt buck to HT and valve heater supply unit and that is powered by my small bench supply bottom left.  The DVM is monitoring the EHT and the final should be 20 x reading.

I am trying a '5EP1'.  This is a CRT with post acceleration, I thought I would try a situation where I am still using the voltages for the DG7-5 on the CRT but have approx 2000 Volts plus on the final anode.

As I am using grid modulation and varying the cathode for brightness then the brightness control can effect the focus etc.

I was surprised to find it did actually work OK with minimal tweaks to the Knobs.  The final EHT voltage was at 2400 Volts.
   
I am over scanning the height by quite a bit so need to include a height control, looking with my eyes direct at the screen I can just make out the 2MHz grating, so not so bad after all.

It shows to me I can take the TV a bit further.  I need to get hold of some better transformers, I need more heater current as I am very close to the limit for this one which is why the EHT is on a separate supply.

I also need to find a suitable adhesive that is thin enough to poor into the valve base that will re-stick it, I hate the prospect of un soldering the CRT base cleaning and then sticking it back on with araldite, I will ending breaking off wires yet.

Adrian

p.s. I do now have a focus and scan coil for the MW6-2

[AdrianPH]

Slowly continuing to update/modify things as I go.  The 5CP1 CRT is now in a box with the rest excluding the PSU.

Added Width and Height controls to the timebase.  Decided to use Youtube to host the odd video of builds as I go, bit of a faff but.

Video

Adrian

[AdrianPH]

As a side note, I watched Trevor's videos on the Cossor which give me the idea to use Youtube.

I do have a battered MW6-2 and a set of scan coils, but also decided to pick up a few days ago, one of the old 5.5 inch TV's from ebay for not a lot. So when I start to play with electromagnetic deflection I can happily rip the set to pieces for the scan coils, tube and hopefully tuner.

Adrian

[peter scott]

Hi Adrian,

Your video link isn't connecting to YouTube for me.

Peter

[Murphyv310]

Same here.

[AdrianPH]

https://youtu.be/md1DwCDHfzI

Not sure what happened to loose the link as it worked elsewhere, also no notification of replies, hence the wait until I came back to the site now.

Adrian